A masochistic sexual act in which can be anal, oral or vaginal.
In the oral version, the giver has to have just eaten something spicy like a vindaloo, before giving the receiver oral. The time is normally accounted for.
In the anal and vaginal version, curry/chili powder is rubbed into the penis/anus/vagina before intercourse. Normally, sex stops before the climax because of the pain.

You're buying a lot of Curry powder... how come?
Me and my partner are planning to cook the currywurst tonight!